This is funny because it is common for the promoters of sporting events to fire free promotional t-shirts out of an air cannon to members of the crowd as prizes. Since these launchers typically have a fixed range and are fired from the edge of the playing field, the majority of them end up landing among the further, less expensive seating areas of the venue. The poster is demonstrating his wealth by indicating that the expensive seats that he typically enjoys at sporting events are too close to the field of play to be within the trajectory arc of the t-shirt launcher.